Stable Multimetallic Nanoparticles for Oxygen Electrocatalysis

Lacey, Steven D.; Dong, Qi; Huang, Zhennan; Luo, Jingru; Xie, Hua; Lin, Zhiwei; Kirsch, Dylan; Vattipalli, Vivek; Povinelli, Christopher; Fan, Wei; Shahbazian‐Yassar, Reza; Wang, Dunwei; Hu, Liangbing

doi:10.1021/acs.nanolett.9b01523

Cited by 108 publications

(99 citation statements)

References 76 publications

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“…These hollow HEA materials can serve in a broad range of applications, such as catalysis, energy, and portable electronics. [19,21,23] As a proof-of-concept demonstration, we aimed to exploit the catalytic activities of these materials for energy conversion and storage devices, such as metal-air batteries and fuel cells. Two immediate advantages can be expected from these high-entropy hollow particles.…”

Section: −1mentioning

confidence: 99%

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Continuous Synthesis of Hollow High‐Entropy Nanoparticles for Energy and Catalysis Applications

et al. 2020

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Mixing multimetallic elements in hollow‐structured nanoparticles is a promising strategy for the synthesis of highly efficient and cost‐effective catalysts. However, the synthesis of multimetallic hollow nanoparticles is limited to two or three elements due to the difficulties in morphology control under the harsh alloying conditions. Herein, the rapid and continuous synthesis of hollow high‐entropy‐alloy (HEA) nanoparticles using a continuous “droplet‐to‐particle” method is reported. The formation of these hollow HEA nanoparticles is enabled through the decomposition of a gas‐blowing agent in which a large amount of gas is produced in situ to “puff” the droplet during heating, followed by decomposition of the metal salt precursors and nucleation/growth of multimetallic particles. The high active sites per mass ratio of such hollow HEA nanoparticles makes them promising candidates for energy and electrocatalysis applications. As a proof‐of‐concept, it is demonstrated that these materials can be applied as the cathode catalyst for Li–O2 battery operations with a record‐high current density per catalyst mass loading of 2000 mA gcat.−1, as well as good stability and durable catalytic activity. This work offers a viable strategy for the continuous manufacturing of hollow HEA nanomaterials that can find broad applications in energy and catalysis.

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Section: −1mentioning

confidence: 99%

“…−1 ) for cycling tests to evaluate the catalyst stability, which is another key feature that such high-entropy materials should offer. [14,23] With a capacity cutoff at 4000 mAh g cat.…”

Section: −1mentioning

confidence: 99%

Continuous Synthesis of Hollow High‐Entropy Nanoparticles for Energy and Catalysis Applications

et al. 2020

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“…High-entropy alloys (HEAs) possess uniform element distribution and favourable conductivity [6]. Most HEAs contain Co, Fe and Ni metals.…”

Section: Hydroxylated High-entropy Alloy As Highly Efficient Catalystmentioning

confidence: 99%

“…The performance of Fe metals is improved after HF treatment, indicating that Fe plays important roles in enhancing the performance of HF-HEA. Previous literatures have proved that the catalytic activities of ternary (oxy)hydroxides exceed those of single or binary (oxy)hydroxides due to the charge redistribution and optimized adsorbing ability to *OH [4][5][6]. The introduction of Fe could improve the performance of CoOOH and NiOOH.…”

Section: Science China Materialsmentioning

confidence: 99%

Hydroxylated high-entropy alloy as highly efficient catalyst for electrochemical oxygen evolution reaction

Zhang

et al. 2020

Sci. China Mater.

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“…[ 3 ] The slow rate of OER in turn adversely affects the overall rate of water splitting for hydrogen production. [ 4 ] It is, therefore, essentially required to develop stable, economical, and effective electrocatalysts for OER for the feasible production of H 2 by water splitting. Currently, IrO 2 and RuO 2 are the benchmark OER catalysts to significantly improve slow kinetics of oxygen evolution at the anode.…”

Section: Introductionmentioning

confidence: 99%

Gold‐Supported Gadolinium Doped CoB Amorphous Sheet: A New Benchmark Electrocatalyst for Water Oxidation with High Turnover Frequency

Haq

Mansour

Munir

et al. 2020

Adv Funct Materials

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Electrochemical water splitting has been considered a promising approach for green and sustainable hydrogen as a future energy carrier. However, the lack of high performance and inexpensive electrocatalysts for kinetically sluggish oxygen evolution reaction (OER) hinder the practical application. Here, the noteworthy enhancement of electrodeposited cobalt boride (CoB) nanosheets from the combined effect of using gadolinium as a dopant and thin film of gold as prudent support is demonstrated. The free-standing Gd-CoB@Au exhibits remarkable electrochemical performance, high intrinsic activity, and lower reaction resistance, which are confirmed by lower onset potential, small charge transfer resistance, lower Tafel slope value, and high turnover frequency. Furthermore, the post-OER characterization signpost, no observable change in the chemical structure or morphology of nanosheets during the long-lasting oxidation process. Because of the inexpensive, facile, and scalable one-step preparation processes, the catalyst is highly encouraging for large-scale practical applications.in pursuing toward viable electrochemical water splitting module. [1] The HER follows a relatively simple mechanism and various cost-effective and efficient metal/ alloy-based catalysts have been developed to produce hydrogen at fairly low overpotential. [2] A serious challenge, however, is the slow rate of multistep OER, which requires high activation energy and thus large overpotential to break OH bond, and to form an OO bond and transfer 04 electrons essentially required for oxygen evolution from two water molecules at the same time. [3] The slow rate of OER in turn adversely affects the overall rate of water splitting for hydrogen production. [4] It is, therefore, essentially required to develop stable, economical, and effective electrocatalysts for OER for the feasible production of H 2 by water splitting. Currently, IrO 2 and RuO 2 are the benchmark OER catalysts to significantly improve slow kinetics of oxygen evolution at the anode. These electrocatalysts are made up of expensive precious metals, and their supply is not sustainable and is, therefore, not much suitable for large-scale applications in water oxidation systems. [5] Besides precious metals, several costeffective nanoscale materials including layer double hydroxides, perovskite, amorphous/crystalline metal hydroxides have been extensively explored for OER. [6][7][8] Hence, it is well established, that nano-structuring is one of the widely adopted strategies to enhance the catalytic properties and selectivity, toward the OER for practical application. [9] However, low mass loading of catalyst, mechanical and chemical instability, less exposed surface area, reproducibility, potentially induced phase/electronic transformation during catalysis, surface leaching of the catalyst due to the low adhesion of catalyst are still serious concerns that need to be addressed. [10] Also, the use of powder nanomaterials traditionally needs various binders (Nafion/polymers) for the fabricati...

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Stable Multimetallic Nanoparticles for Oxygen Electrocatalysis

Cited by 108 publications

References 76 publications

Continuous Synthesis of Hollow High‐Entropy Nanoparticles for Energy and Catalysis Applications

Continuous Synthesis of Hollow High‐Entropy Nanoparticles for Energy and Catalysis Applications

Hydroxylated high-entropy alloy as highly efficient catalyst for electrochemical oxygen evolution reaction

Gold‐Supported Gadolinium Doped CoB Amorphous Sheet: A New Benchmark Electrocatalyst for Water Oxidation with High Turnover Frequency

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